Description : Among Cis and Trans structure of Hex-2-ene which has higher boiling point and why?
Last Answer : Ans: The dipole moment of a molecule depends upon dipole-dipole interactions. Since cis-isomer has higher dipole moment, therefore it has higher boiling point.
Description : What is the term used for isomers that are in rapid equilibrium? (a) keto-enol tautomers (b) constitutional isomers (c) conformational isomers (d) cis-trans isomers
Last Answer : keto-enol tautomers
Description : Predict which of the following alkenes reacts the fastest with HCl? (a) CH3CH2CH2CH2CH=CH2 (b) cis-CH3CH2CH=CHCH2CH3 (c) trans-CH3CH2CH=CHCH2CH3 (d) (CH3)2C=CHCH2CH3
Last Answer : (CH3)2C=CHCH2CH3
Description : What is(are) the product(s) in the Pd-catalyzed hydrogenation of 1,2- dimethylcyclopentene? (a) trans-1,2-dimethylcyclopentane (b) cis-1,2-dimethylcyclopentane (c) a mixture of trans and cis-1,2-dimethylcyclopentane (d) 1,1-dimethylcyclopentane
Last Answer : cis-1,2-dimethylcyclopentane
Description : What is the product when 3-heptyne reacts with the Lindlar catalyst? (a) 2-methyl-2-heptene (b) trans-3-heptene (c) cis-2-methyl-3-hexene (d) cis-3-hexene
Last Answer : cis-3-hexene
Description : Which of the following is the most stable alkene? (a) trans-3-hexene (b) cis-3-hexene (c) 1-hexene (d) (Z)-3-hexene
Last Answer : trans-3-hexene
Description : Which of the following statements about propene, CH3CH=CH2, is correct? (a) All nine atoms lie in the same plane. (b) The compound has a cis and trans isomer. (c) There is a total of eight sigma bonds. (d) All the carbon atoms are sp2 hybridized
Last Answer : There is a total of eight sigma bonds.
Description : Which of the following compounds will have zero dipole moment? (a) cis-1,2-dibromoethylene (b) 1,1-dibromoethylene (c) trans-1,2-dibromoethylene (d) all of these
Last Answer : trans-1,2-dibromoethylene
Description : Why do trans isomers of alkenes have lower boiling points than cis isomers? (a) trans isomers have better symmetry (b) cis isomers have better symmetry (c) trans isomers are less polar (d) cis isomers are less polar
Last Answer : trans isomers are less polar
Description : How do the melting points of trans isomers compare to the cis isomers for alkenes? (a) cis isomers have higher melting points (b) trans isomers have higher melting points (c) both have similar melting points (d) no consistent trend is observed
Last Answer : trans isomers have higher melting points
Description : . A and B are stereoisomers. They are nonsuperimposable and are mirror images of one another. Which of the following best describes the relationship between A and B? (a) structural isomers (b) enantiomers (c) cis-trans isomers (d) diastereomers
Last Answer : enantiomers
Description : Which of the following is capable of exhibiting cis-trans isomerism? (a) 1-butene (b) 1-pentene (c) ethene (d) 2-butene
Last Answer : 2-butene
Description : Which of the statements is false regarding chiral compounds? (a) rotate the plane of polarized light (b) have cis and trans isomers (c) exist as enantiomers (d) can be detected with a polarimeter
Last Answer : have cis and trans isomers
Description : Which of the following compounds may exist as cis-trans isomers? (a) 1-Butene (b) 2-Butene (c) Cyclopropane (d) Acetone
Last Answer : 2-Butene
Description : Which of the following compounds will show dipole moment? (a) cis-1,2-dichloroethylene (b) o-dichlorobenzene (c) trans-1,2-dichloroethylene (d) p-dichlorobenzene
Last Answer : cis-1,2-dichloroethylene o-dichlorobenzene
Description : Point group C2h belong to the molecule a. H2O b. BeH2 c. Cis C2H4 d. Trans C2H4
Last Answer : d. Trans C2H4
Description : What is the name given to the non-superimposable mirror image forms of chiral compounds? w) cis-trans x) enantiomers y) functional isomers z) diasteriomers
Last Answer : ANSWER: X -- ENANTIOMERS
Description : Which can show the cis-trans isomerism:
Last Answer : Which can show the cis-trans isomerism: A. `CICH_(2)CH_(2)CI` B. `CI_(2)C=C=CH_(2)` C. `CH_(2)C=CCI_(2)` D. CICH=C=CHCI
Description : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. (i) 1e, 2e (ii) 1e, 3e (iii) 1e,
Last Answer : Which of the following combination of axial & equitorial bonds show Cis or Trans orientation in Dimethyl cyclohexane. ... 3a (vi) 1e, 4a (vii) 1a, 3a
Description : In which compound, Cis-Trans nomenclature cannot be used?
Last Answer : In which compound, Cis-Trans nomenclature cannot be used? A. `CH_(3)-CH=CH-CH_(3)` B. `CH_(3)-CH=CH-COOH` C. D. `C_(6)H_(5)-CH=CH-CHO`
Description : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands)
Last Answer : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands) A. ` ... . `Ma_(2)b_(2)` D. `Mab_(3)`
Description : Why cis isomers are polar and trans are not?
Last Answer : Need answer
Description : what is indicated by the prefixes cis- and trans-?
Last Answer : The type of stereoisomer
Description : Inducers and repressors are (A) Enhancer and silencer elements respectively (B) Trans-acting factors (C) Cis-acting elements (D) Regulatory proteins
Last Answer : Answer : B
Description : Besides structural genes that encode proteins, DNA contains some regulatory sequences which are known as (A) Operons (B) Cistrons (C) Cis-acting elements (D) Trans-acting factors
Last Answer : Answer : C
Description : Prosthetic group in cone cell phototreceptors is (A) Iodine (B) Opsin (C) 11-cis-retinal (D) all-trans-retinal
Description : When light falls on rod cells (A) All-cis-retinal is converted into all-trans-retinal (B) 11-cis-retinal is converted into 11-trans-retinal (C) 11-trans-retinal is converted into all-transretinal (D) 11-cis-retinal is converted into all-trans-retinal
Last Answer : Answer : D
Description : Rhodopsin contains opsin and (A) 11-cis-retinal (B) 11-trans-retinal (C) All-cis-retinal (D) All trans-retinal
Last Answer : Answer : A
Description : On exposure to light rhodopsin forms (A) All trans-retinal (B) Cis-retinal (C) Retinol (D) Retinoic acid
Description : Folding of newly synthesized proteins is accelerated by (A) Protein disulphide isomerase (B) Prolyl cis-trans isomerase (C) Chaperonins (D) All of these
Description : The retinal pigment epithelium (RPE): a. is sensitive to hypervitaminosis A b. isomerizes all-trans-retinal to 11-cis-retinol c. does not undergo mitosis in response to injury d. secrets the outer layer of the basal lamina that forms the Bruch's membrane.
Last Answer : isomerizes all-trans-retinal to 11-cis-retinol
Description : During phototransduction: a. hyperpolarisation occurs due to closure of the sodium channels b. 11-cis-retinal molecules are converted to all-trans-retinal c. transducin, a G protein converts GDP to GTP d. all above
Last Answer : all above
Description : Two dominant nonallelic genes are 50 map units apart. The linkage is (a) cis type (b) trans type (c) complete (d) absent/incomplete.
Last Answer : (d) absent/incomplete.
Description : When two genetic loci produce identical phenotypes in cis and trans position, they are considered to be (a) multiple alleles (b) the parts of same gene (c) pseudoalleles (d) different genes
Last Answer : (c) pseudoalleles
Description : Describe the location of the cis-Golgi and trans-Golgi in relation to the ER.
Last Answer : The cis-Golgi is closest to the ER, where it is uniquely positioned to receive vesicles that bud off from the ER. The trans-Golgi is located farthest from the ER, and functions to help ... vesicles for delivery to their final destination (e.g. lysosomes, storage vesicles, or the plasma membrane).
Description : What are the two faces of the Golgi body? (A) Funny face and goofy face (B) Coated face and non-coated face (C) Saving face and loosing face (D) Cis face and Trans face
Last Answer : (D) Cis face and Trans face
Description : The transport vesicles from the Endoplasmic Reticulum(ER) fuse with the ____of the Golgi apparatus. (A) Cis face (B) Trans face (C) Coated face (D) Both A and B
Last Answer : (A) Cis face
Description : What is the IUPAC name for isoprene? (a) 1,3-pentadiene (b) 2,4-pentadiene (c) 2,3-dimethyl-1, 3-butadiene (d) 2-methyl-1,3-butadiene
Last Answer : 2-methyl-1,3-butadiene
Description : Reliability is most simply known as which of the following? a. Consistency or stability b. Appropriateness of interpretations on the basis of test scores c. Ways in which people are the same d. A rank order of participants on some characteristic
Last Answer : a. Consistency or stability
Description : Rank the following substances in order of increasing boiling point (lowest → highest): (1) CH3CH2CH2CH2OH, (2) (CH3)2CHOCH3, (3) (CH3)3COH (a) (1) < (2) < (3) (b) (2) < (1) < (3) (c) (2) < (3) < (1) (d) (3) < (2) < (1)
Last Answer : (2) < (3) < (1)
Description : The carbon-carbon bond lengths in rank of increasing bond length is : (a) triple, double, single (b) single, double, triple (c) single, triple, double (d) triple, single, double
Last Answer : triple, double, single
Description : Arrange the following free radicals in increasing order of stability:
Last Answer : Arrange the following free radicals in increasing order of stability:
Description : Arrange the following resonating structures in order of increasing stability `underset((I))(CH_(2)=overset(+)(N)=overset(-)(N))" "underset((II))(H_(2)
Last Answer : Arrange the following resonating structures in order of increasing stability `underset((I))(CH_(2)=overset(+)(N)= ... gt IV D. III gt I gt IV gt II
Description : The increasing order of stability of the following free radicals is :
Last Answer : The increasing order of stability of the following free radicals is : A. `(CH_(3))_(2)overset(.)CHlt(CH_(3)) ... (.)Clt(C_(6)H_(5))_(2)overset(.)CH`
Description : Arrange the following carbocations in order of increasing stability : `{:(underset("(I)")((CH_(3))_(3)Coverset(+)CH_(2))", "underset("(II)")((CH_(3))_
Last Answer : Arrange the following carbocations in order of increasing stability : `{:(underset("(I)")((CH_ ... ` C. `IltIIIltIVltII` D. `IIltIVltIII ltI`
Description : With increasing bond order, stability of a bond (a) Decreases (b) Increases (c) Remains unchanged (d) None of these
Last Answer : Ans:(b)
Description : Give reason for the following observation (L-III) (a)- The tendency for catenation decreases down the group in group 14 (b)- The decreasing stability of+3 oxidation state with increasing atomic no. in group 13. (c)- Molten aluminum bromide is a poor conductor of electricity.
Last Answer : Ans. -(a) it is due to decrease in bond dissociation energy which is due to increase in atomic size C-C > Si-Si >Ge-Ge>Sn-Sn>Pb-Pb. (b)- It is due to inert pair effect. (c)- Molten AlBr3 is poor conductor of electricity because it is covalent compound.
Description : What is the reason for the increasing stability of peroxide & superoxide of alkali metals down the group?
Last Answer : On combustion in excess of air, lithium forms mainly the oxide, Li2O (plus some peroxide Li2O2), sodium forms the peroxide, Na2O2 (and some superoxide NaO2) whilst potassium, rubidium and ... are also paramagnetic. Sodium peroxide is widely used as an oxidising agent in inorganic chemistry.
Description : Pick out the wrong statement. (A) Angle of repose of coal increases with its increasing size (B) Specific gravity of coal increases with its increasing maturity (C) Refractive index and reflectance of ... of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal
Last Answer : (D) Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal